Which of the following statements are true ? There maybe more than one correct a
ID: 679671 • Letter: W
Question
Which of the following statements are true? There maybe more than one correct answer.a) For an acid H-A : the greater the electronegativity of A,the stronger the acid HA b) For an acid H-A : the stronger the H-A bond, the strongerthe acid H-A c) HF is a stronger acid than HCl d) HClO4 is a weaker acid than HClO2 e)HClO is a stronger acid than HBrO f) For carboxylic acids : the greater the electronegativitiesof the atoms in the carboxyl group, the stronger the acid
Which of the following statements are true? There maybe more than one correct answer.
a) For an acid H-A : the greater the electronegativity of A,the stronger the acid HA b) For an acid H-A : the stronger the H-A bond, the strongerthe acid H-A c) HF is a stronger acid than HCl d) HClO4 is a weaker acid than HClO2 e)HClO is a stronger acid than HBrO f) For carboxylic acids : the greater the electronegativitiesof the atoms in the carboxyl group, the stronger the acid
Explanation / Answer
I'll address each possible answer: a) generally, but not always. F is more electronegative than Cl,but HCl is a much stronger acid that HF. This is incorrect b) This is pretty much the opposite of what a strong acid is. Thestronger an acid, the easier it gives up an H. This isincorrect. c) HF is weaker than HCl. HCl is a strong acid; HF is not. Thisjust needs to be memorized. This is incorrect. d) HClO4 is stronger than HClO2. Same reason as c. This isincorrect. e) This is probably true. Cl is more electronegative than Br, so itis more likely to pull electrons from O, which will weaken the bondbetween H--O and make the H more acidic.This is correct. f) More electronegative atoms will pull electrons closer to then,meaning that the O will have a weaker bond with the H, thus makingit more acidic. This is correct. Thus, e & f are correct; the others arenot.
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